Optical Phenomena & Properties Of Materials Flashcards
1
Q
Photoelectric effect
A
Process whereby electrons are ejected from a metal surface when light of suitable frequency is incident on that surface
2
Q
Threshold frequency
A
Min. frequency of light needed to emit electrons from a certain metal surface
3
Q
Work function
A
Min. energy that an electron in the metal needs to be emmited from the metal surface
4
Q
Difference between atomic absorption spectra & atomic emission spectra
A
Atomic absorption spectrum is formed when certain frequencies of electromagnetic radiation that passes through a medium.
An atomic emission spectrum is formed when certain frequencies of electromagnetic radiation are emmited due to an atoms electron making a transition from a high energy state to a lower energy state
